Final answer:
The subjunctive is used to express fear, doubt, suggestion and desire in the given sentences in Spanish.
Step-by-step explanation:
1. Tu temes que tus padres tengan un accidente de carro - C) The subjunctive expresses fear.
2. Dudo que mi hermano llegue temprano esta noche - A) The subjunctive expresses doubt.
3. Marcos y yo sugerimos que ustedes hablen con el profesor - D) The subjunctive expresses a suggestion.
4. Espero que mi tia cocine el almuerzo - B) The subjunctive expresses desire.
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